Choose from the options below and click "Plot" to create a time series graph.
Data are available from January 1895 through April 2013.
Move mouse towards an axis until highlighted. Left-click mouse to pan. Shift key + left-click to zoom.
| 1896 | 1897 | 1898 | 1899 | 1900 | 1901 | 1902 | 1903 | 1904 | 1905 | 1906 | 1907 | 1908 | 1909 | 1910 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | 1917 | 1918 | 1919 | 1920 | 1921 | 1922 | 1923 | 1924 | 1925 | 1926 | 1927 | 1928 | 1929 | 1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939 | 1940 | 1941 | 1942 | 1943 | 1944 | 1945 | 1946 | 1947 | 1948 | 1949 | 1950 | 1951 | 1952 | 1953 | 1954 | 1955 | 1956 | 1957 | 1958 | 1959 | 1960 | 1961 | 1962 | 1963 | 1964 | 1965 | 1966 | 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.12" | 15.52" | 10.63" | 12.00" | 15.64" | 19.43" | 14.42" | 15.91" | 20.47" | 17.30" | 23.11" | 24.77" | 15.07" | 22.95" | 18.17" | 21.80" | 14.78" | 15.42" | 25.93" | 21.77" | 23.16" | 16.27" | 14.49" | 14.71" | 13.57" | 20.88" | 18.96" | 17.61" | 7.44" | 18.59" | 14.14" | 19.76" | 14.31" | 12.33" | 14.98" | 11.32" | 16.83" | 11.28" | 11.24" | 17.47" | 16.17" | 16.79" | 23.41" | 13.38" | 18.09" | 24.84" | 18.45" | 18.56" | 14.33" | 17.61" | 15.84" | 13.02" | 13.93" | 12.93" | 13.25" | 16.81" | 22.55" | 14.71" | 14.41" | 12.69" | 19.30" | 14.08" | 22.96" | 11.54" | 11.57" | 12.90" | 15.42" | 18.40" | 12.07" | 19.14" | 13.38" | 21.23" | 13.20" | 23.16" | 14.74" | 17.05" | 11.90" | 18.60" | 18.46" | 16.63" | 12.72" | 9.47" | 23.85" | 15.50" | 21.30" | 12.19" | 24.49" | 29.40" | 18.06" | 13.82" | 20.95" | 10.87" | 13.91" | 14.22" | 11.88" | 12.80" | 14.12" | 22.09" | 11.42" | 26.00" | 17.25" | 19.53" | 27.30" | 15.02" | 15.02" | 12.09" | 12.45" | 17.07" | 13.76" | 22.93" | 20.60" | 10.47" | 12.14" | 13.21" | 16.42" | 21.07" | 11.67" |
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